S-91860A035 0.688" ID x 1.75" OD General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 17-7 PH stainless steel, ideal for harsh industrial environments and outdoor applications.
• Exceptional strength and durability with a Rockwell C40 hardness rating, ensuring long service life under high stress and load.
• Precise fit and reliable load distribution with a 0.688" ID and 1.75" OD, specifically designed for 5/8" screw sizes to prevent loosening and surface damage.
• Environmentally responsible manufacturing with full compliance to RoHS 3 and REACH standards, meeting strict global regulatory requirements.
• Consistent dimensional accuracy in the inch system, guaranteeing easy installation and interchangeability in assemblies.
• Heavy-duty performance with a thickness range of 0.120-0.141", providing robust support for demanding mechanical and structural applications.

Professional Applications & Engineering Value

This 17-7 PH stainless steel flat washer is engineered to address critical challenges in industrial assemblies, such as galvanic corrosion, vibration-induced failure, and material fatigue. Its precipitation-hardening stainless steel composition offers excellent corrosion resistance and maintains mechanical properties in extreme temperatures and corrosive atmospheres, making it suitable for aerospace, marine, chemical processing, and heavy machinery. The precise 0.688" ID and 1.75" OD ensure optimal load distribution, reducing stress concentration on fastened joints and extending the lifespan of 5/8" screw connections. By integrating this washer, engineers achieve enhanced reliability, reduced maintenance costs, and compliance with stringent industry standards for safety and performance.

Specification Summary & Compliance

This flat washer is manufactured to precise dimensional tolerances in the inch system, with an inner diameter of 0.688", outer diameter of 1.75", and thickness ranging from 0.120" to 0.141". It is designed for use with 5/8" screw sizes and features a Rockwell C40 hardness for consistent mechanical performance. The product adheres to applicable industry standards for flat washers and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted hazardous substances and safe for use in regulated markets.